fix(conversation): add missing Japanese quote removal label

The Japanese dictionary landed without the quote removal copy its English and Chinese dictionaries already carry, so the conversation dictionaries do not typecheck against the current master.

packages/client/ui-conversation/src/client/locales.ts

@@ -772,6 +772,7 @@ export const en = {
 
 /** Japanese copy, checked against the English keys. */
 export const ja = {
+  'quote.remove': '引用を削除',
   'shortcut.newline': '改行',
   'shortcut.complementary': '補助のキュー / 実行中の指示変更を使用',
   'shortcut.slash': 'コマンドメニューを開く',